Drawplate of baking-ovens



E. FARWELL.

DRAWPLATE OF BAKING'OVENSJ. APPLICATION FILED Nov. 25, 191.9.

Patented Feb. 22, 1921.

2 SHEETS-SHEET lwq-l' Ql y #wf/vra@ E. FARWELL.

DBAWPLATE 0F BAKING OVENS.

APPLICATION FILED N0v.25, 1919.

1,369,641. Patented Feu-22,1921.

2 SHEETS-SHEET 2.

"gw-NT FFICE.

EDWARD FARWELL, 0F WEYMO'UTI-I, ENGLAND.

DRAWPLATE or naKING-ovnns.

Specification of Letters Patent. i Pajentd Feb, 22, 1792L Application. tiled November 25, 1.919. Serial l\To.34(),59?'.4 7 i To all whom t may concern.'

Be it known that I, EDWARD FARWELL, a subject of the King of Great Britain and Ireland, and a resident of VVeymoutlnv of room taken up by the drawplate of an oven when drawn out.

This invention relates to drawplates of baking ovens, of thel kind in which the baking surface or drawplate is flexible, that is to say, composed of a series of flat plates, strips or sections, articulated together, forming an endless web which can be rolled in or out of the oven. y

In a drawplate as above set forth, the web passed around polygonal or cylindrical drums or chain wheels, carriedv by shafts horizontally mounted in the ends of a frame wagon or carriage which was provided with vrollers adapted to run on rails located inside the oven, and when rolling out the drawplate it was necessary to partly pull out the frame wagon or carriage, and with it the drawplate, before said drawplate could be wound along, by rotating the shaft of the front' drums or chain wheels by means of a handle on the end of said shaft.

According' to the present invention, the frame wagon or c`arriage, and its rollers, is dispensed with, and each plate., strip or section of the drawplate is7 at its ends, pro videdwith side extensions which carry a roller adapted to run in lgrooves inside Athe oven and ,disposed above and below the steam pipeaextending the length of the oven, said grooves being connected together by semi-circular grooves formed on the exterior of a semi-circular chamber forming part of the front plate of the oven.

(In a shaft which extends transversely and centrally through this chamber are located the front sprocket wheels, and in the rear end of the oven are mounted the rear sprocket wheels, and the chains passing over said sprocket wheels are affixed to the Y underside of the central plate, strip or section of the drawplate, the arrangement being such that as the front shaft is rotated by means of a handle or hand wheel affixed thereto, the drawplate is caused to travel outward and then inward to underneath,

the steam pipes in the oven, or vice lversa as the case may be.

As a modification, the rollers on the side extensions ofthe plates, strips or sections may be dispensed with, and said side eX tensions be arranged to take in and travel in the before mentioned grooves.

For a clear understanding of the present invention reference is to be had to the fol-j lowing' description and accompanyingl sheet of drawings, wherein Figure 1 is a longitudinal sectional view illustrating an embodiment of the invention.

Fig. 2 is an end front view, partly broken. away.

Fig. 3 is a vertical transverse sectional view taken on line m, y of Fig. l.

Fig. 4 is a vertical fragmentary sectional view hereinafter referred to.

Fig. 5 is a modification, also hereinafter referred to.

Like letters of reference indicate correi sponding parts in the several figures.

InV carrying out the invention, the dra\v plate is constituted by a series of flat plates or sections a, provided with side extensions" a-Figs. l, 8 and 1e-and flexibly connected together in any suitable manner. plate is, by means of rollers a2, located at the sides of said plate, adapted to work in upper and lower guides b respectively, mounted in or carried by the side walls b2, b3 of the oven b4, and said drawplateis connected in any suitable manner at a3 to two endless chains c, c passing around pairs of front and rear sprocket wheels c2, c3,

mounted on rotatable shafts c", c5 respec-v tively.

'Ih'e front sprocket wheels c2 are housed within a chamber frame a in which the oven door Z2 slides with the aid of racks and pinions d3, Z4 in the known manner.

The chamber d, which at its front end is semi-circular, is provided respectively with semi-circular end grooves d5, d6 thereon, said grooves d5, ZG forming the continuation of the upper and lower grooves b, b".

@n rotating the shaft c4 of the front sprocket wheels c2 by means of a hand wheel c5 thereon, or by a suitable arrangement of mechanism, the drawplate is caused to travel forward, the oven door being raised, through the opening b5 in the front wall and door This Y or hood rcarried by the frame, and gradually returned into the oven j through an opening ZJG in the lower part of the frame Z1 and front wall to a position beneath the steam pipes e or" said oven, the rollers a2 of the drawplate traveling along the grooves o, around the semi-circular grooves d5', is and grooves 'b1 as in Fig. 4, the sections olf the plate taking, lengthwise, between the grooves (Z5, d6 on the Chamber d.

Reverse rotation oi' the hand wheel c6 or actuating mechanism, returns the drawplate to its position in the oven and above the steam pipes e, it being charged during such return, the opening o in the lower part oi' the oven being closed, in a steam-tight manner, as theend or thev drawplate leaves the oven, by means of a slidable or other door f, the upper opening b5 being closed by the door 'f2 as the end orp the' drawplate passes into the oven. i Instead of employing rollers to take inthe grooves 5, b, d5, d0,ith`e drawplate mayasshown in Fig. -by'its side extensions al, take, in a slidable manner, directly in said grooves,` the semi-circular grooves als, ZVbeing modilied to allow of said side extensions turningin said semieirc`ular grooves a'd, l claimf n 'i l. A drawplate structure t'or bahingovens including combination' with the 'oven havI pair" ol' parallel guides arranged within the' oven, a hood arranged atrone endlor lthe guides and having therein ing' an opening, oi

a substantially lishaped guide for connecting the said lirst mentioned guides, a drawplate slidably mounted in the guides, sprockets i'oeated within the hood, sprockets' at the opposite `end of said guides, a chain workf ingoveil said sprockets in the hood and at the opposite ends el the guides and connected with said drawplate, and means ifor'operatl ing thesproclets in the hood. e

drawplate structure for balring ovens V"nding in combination with the oven having' an opening, of n 'pper and lower sets of diei gnifes arranged withinthe oven i nl extending to the said opening, a hood if n i 'no` snb antial U-shaped guide tracks @ting with the npper'and lower 'oi the said sets to form continuons g yatene end of the oven,v ashaft in said heod7sproekets on said sha't,va shaft and ing an opening,

sprockets at the end of the upper and lower guide sets opposite the opening in the oven, chains engaging said sprockets, a drawplate havinga slidable engagement with the upper and lower sets of guide rails and engaging saidchains, an operating wheel carried by the shaft in said hood, and doors located at each side of the opening in the oven and adapted to slide toward the ends of the hoodV to close the opening.

A drawplate structure Jfor baking ovens including in Combination with the oven having an' opening, aV flexible drawplatemounted within the oven, means including a hood at the opening of the oven l'or permitting the shifting or' the flexible drawplate i'rom one position to another, and doors located at 'opposite sides ofthe opening and slidable toward the hood to close the oven opening.

1L. A drawplate struc nre for baking ovens including in vcombination with the oven havupper and lower 'sets of rails within the oven, av vflexible drawplate yslidable in the 'guide rails, means' lo' cateo at rtheopening or the oven orconnect` ing the upper andlowerfse'ts of guide rails to permit of thel transfer of the drawplate from the upper'g'uide rails to the lower guide rails, and doors slidabl;` in tions and cooperating with the edges of the hood to' close the opening.Vv

i `5. A drawplate struetnre guide for baking ovens including in combination with the oven havy in 'the oven, a liexible drawplate sli'dable in Atnegnide rails, a frame fitted to the' ovenat the opening and carrying therewith' a hood,-

said hood-having means for connecting the upper and lower set of Guide rails to iiorinv a 'eront'nuous channel gior the' drawplate with lthe edges of the lhood Itof vCompletely close the opening ofthe ovenk when desired;

inl testimony whereof I signature 'hereto this' 8th dayV of @ctober,

19,19. f i l EDWARD ran-WELL.

opposite 'direc-V ing an opening', of guide vrails engaged with-A have atlixed my 

